--- Why does the lake smell terrible?--- Because large quantities of water _________.
#101273
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
推荐题目
Traffic conditions in Beijing ________ for decades. At first people only complained about jams during rush hours，but today every hour is rush hour.
#101468
A
is worsening
B
have worsened
C
have been worsening
D
worsened
---I hear you won the prize in the English contest last week. ---That was the second time I ________ the prize.
#99979
A
had got
B
got
C
get
D
have got
-Did you catch the first bus?-No ,it_______ the stop by the time I got there.
#99859
A
left
B
was leaving
C
had left
D
would leave
They ___ every means, but the engine __ work.
#103984
A
tried; couldn't
B
have tried; won't
C
tried; won't
D
have tried; can’t
I want to buy that kind of cloth because I ______ the cloth ______ well．
#102290
A
have told; washes
B
was told; washed
C
have been told; washes
D
have been told; is washed